Disabled Skeletal Mesh Sections cause Shadow Ray Tracing Flicker

UE - Graphics Features - Ray Tracing - Dec 12, 2025

If a skeletal mesh has a section disabled the ray traced shadow will flicker when the camera or itself moves. Previously in 5.6.0 no raytraced shadow would appear if a section was disabled. This wa ...

Morph target is not applied on the first frame in Level Sequence

UE - Anim - Rigging - Dec 4, 2025

When a skeletal mesh with morph targets spawns in the sequence, the morph is not reflected in the first frame.  In the ProcessStage_SkinCache call of SkeletalMesh, MorphVertexBuffer->SectionIds is ...

Placed render targets are not initialized properly in D3D12

UE - Rendering Architecture - RHI - Nov 21, 2025

Animation Constraint Jitter in Sequence when Constraining Layered Control Rig node

UE - Anim - Anim in Engine - Nov 6, 2025

When using constraints with layered control rigs, you get jitter on the constrained object. ...